Download IPR-06-05

2
Performance
2.1
Equipment
2.1.1
Borehole KA3065A03
The experimental set-up consists of a telescoped large-diameter borehole (KA3065A03)
that intercepts a previously identified fracture. The intersected part of the fracture is
packed off using a special "packer" which seals around the developed core stub. A
solution with conservative and sorbing radioactive tracers can be injected and circulated
in the isolated section. A small diameter (36 mm) borehole, approximately one metre
long, has been drilled in the centre of the stub. 300 mm section of the small diameter
borehole is packed off for tracer circulation purposes. Further, the borehole outside the
stub is packed off with mechanical and inflatable packers to avoid effects of the acting
hydraulic gradient. A schematic diagram of the packer system used to complete the
LTDE test hole is shown in Figure 3.
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